31132159 has 2 divisors, whose sum is σ = 31132160. Its totient is φ = 31132158.

The previous prime is 31132141. The next prime is 31132169. The reversal of 31132159 is 95123113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31132159 - 2²¹ = 29035007 is a prime.

It is a super-2 number, since 2×31132159² = 1938422648002562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31132169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566079 + 15566080.

It is an arithmetic number, because the mean of its divisors is an integer number (15566080).

Almost surely, 2^31132159 is an apocalyptic number.

31132159 is a deficient number, since it is larger than the sum of its proper divisors (1).

31132159 is an equidigital number, since it uses as much as digits as its factorization.

31132159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 25.

The square root of 31132159 is about 5579.6199691377. The cubic root of 31132159 is about 314.5838428170.

The spelling of 31132159 in words is "thirty-one million, one hundred thirty-two thousand, one hundred fifty-nine".